公开(公告)号：US20240425414A1

公开(公告)日：2024-12-26

申请号：US18750329

申请日：2024-06-21

Applicant: The Regents of the University of Michigan ,  Georgia Tech Research Corporation

Inventor： Victor C. LI ,  Duo ZHANG ,  Kimberly KURTIS

IPC: C04B28/04 ,  C04B14/06 ,  C04B14/10 ,  C04B14/28 ,  C04B16/06 ,  C04B18/08 ,  C04B18/22 ,  C04B24/38 ,  C04B103/32

Abstract: An engineered cementitious composite (ECC) that forms extremely durable concrete (EDC) is provide that includes Portland cement binder, a tire-derived rubber granular component (e.g., crumb rubber), a calcined clay component comprising a calcined clay, Portland cement component, and limestone, water, a superplasticizer, a polymeric or natural fiber, and optionally further including silica sand, microsilica, fly ash, a cellulose-based viscosity modifier, microsilica, or combinations thereof. Such an engineered cementitious composite has a tensile strain capacity of greater than or equal to about 3% and an ultimate tensile strength of greater than or equal to about 2.2 MPa. Such an ECC has high toughness and can be loaded in both tension and compression having a built-in capability of crack width control without the need for steel reinforcement.

公开(公告)号：US20230256649A1

公开(公告)日：2023-08-17

申请号：US18013469

申请日：2021-07-02

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Jonathan Wesley MCGEE ,  Victor C. LI ,  Tsz Yan NG

IPC: B28B1/00 ,  B28B17/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y70/10

CPC classification number: B28B1/001 ,  B28B17/0081 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y70/10

Abstract: An automated robotic printing device for additive manufacturing or three-dimensional printing of an engineered cementitious composite (ECC) structure is provided. The device has a feeding system and an automated extrusion system configured to receive the ECC composition from the feeding system and deposit the ECC composition onto a target. The automated extrusion system comprising at least one robotic device comprising a tiltable and steerable deposition head that comprises an extrusion nozzle having a substantially rectangular opening and at least one shaping blade at a terminal end to shape and deposit the cementitious composition onto a target. Methods of additive manufacturing of a structure from the ECC compositions are also provided.

公开(公告)号：US20180016752A1

公开(公告)日：2018-01-18

申请号：US15550304

申请日：2016-02-10

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Victor C. LI ,  Emily HERBERT

IPC: E01B3/32 ,  C04B16/06 ,  C04B14/06 ,  C04B28/04 ,  C04B18/14 ,  C04B103/44 ,  C04B103/32

CPC classification number: E01B3/32 ,  C04B14/06 ,  C04B16/06 ,  C04B18/146 ,  C04B28/04 ,  C04B40/0675 ,  C04B2103/32 ,  C04B2103/44 ,  C04B2201/52 ,  E01B3/28 ,  Y02A30/336 ,  Y02W30/92 ,  Y02W30/94 ,  Y02W30/96 ,  C04B16/0616 ,  C04B18/08 ,  C04B18/082 ,  C04B18/22

Abstract: A railway tie being constructed of an engineered cementitious composite (ECC) material having: (1) a minimum of 2% tensile ductility of ECC, (2) complete absence of alkali-silica reaction (ASR), (3) high fatigue resistance of ECC at least five times that of normal concrete, (4) self-healing ability of ECC requiring only water and air, and (5) customization of ECC for lower stiffness in the tie (60% that of normal concrete) and higher abrasion resistance in the seat (three times that of normal concrete).

公开(公告)号：US20210388609A1

公开(公告)日：2021-12-16

申请号：US17292185

申请日：2019-11-08

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Victor C. LI

IPC: E04B2/18 ,  E04B5/08 ,  E04B5/00 ,  E01D19/12

Abstract: A new civil infrastructure construction scheme is provided that is capable of meeting various objectives, including reducing climate change, addressing labor shortage issues, and enhancing construction productivity. Methods of forming load-bearing structures include placing a first reusable load-bearing element adjacent to a second reusable load-bearing element. The first reusable load-bearing element is fixed with respect to the second reusable load-bearing element without any adhesive or mortar. The first reusable load-bearing element and the second reusable load-bearing element respectively have a compressive strength of greater than or equal to about 25 MPa. The first and second reusable load-bearing elements optionally may be formed by additive manufacturing with a printable cementitious composition, such as an engineered cementitious composite.

公开(公告)号：US20200331165A1

公开(公告)日：2020-10-22

申请号：US16760706

申请日：2018-10-31

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Daniel G. SOLTAN ,  Victor C. LI

IPC: B28B1/00 ,  C04B14/06 ,  C04B28/06 ,  C04B14/10 ,  C04B16/02 ,  C04B16/06 ,  C04B20/00 ,  B28B1/52 ,  B33Y70/10 ,  B33Y10/00 ,  B33Y80/00

Abstract: Printable cementitious compositions for additive manufacturing are provided, that have a fresh state and a hardened state. In fresh state, the composition is flowable and extrudable in the additive manufacturing process. In the hardened state, the composition exhibits strain hardening. In one variation, the strain hardening is represented by a uniaxial tensile strength of ≥about 2.5 MPa, a tensile strain capacity of ≥about 1%, and a compressive strength at 100 hours of ≥about 20 MPa. In other variations, the composition includes Portland cement, a calcium aluminate cement, a fine aggregate, water, a high range water reducing agent (HRWRA), and a polymeric fiber, as well as one or more optional components selected from: fly ash, silica flour, microsilica, attapulgite nanoclay, and/or hydroxypropylmethyl cellulose (HPMC). Methods of additive manufacturing with such compositions are also provided.

公开(公告)号：US20150274594A1

公开(公告)日：2015-10-01

申请号：US14667821

申请日：2015-03-25

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Victor C. LI ,  Qian ZHANG

IPC: C04B28/28

CPC classification number: C04B28/28 ,  C04B28/02 ,  C04B2111/00068 ,  C04B2111/00146 ,  Y02A30/336 ,  C04B14/202 ,  C04B20/0036 ,  C04B20/0048 ,  C04B24/2641 ,  C04B38/0054 ,  C04B2103/304 ,  C04B2103/32 ,  C04B16/0641 ,  C04B16/0633

Abstract: A formulation of a spray applied fire-resistive engineered cementitious composite (SFR-ECC) which is made by addition of polymeric fibers, vermiculite, bonding agent and lightweight aggregates to cement and water. The SFR-ECC formulation is made in wet cement and can be spray-applied. The durable SFR-ECC exhibits thermal conductivities sufficient for fire resistance with increased tensile ductility and impact resistance.

Abstract translation: 喷雾施用的耐火工程水泥复合材料（SFR-ECC）的配方，其通过将聚合物纤维，蛭石，粘合剂和轻质骨料加入水泥和水中制成。 SFR-ECC配方采用湿式水泥制成，可喷涂。 耐用的SFR-ECC具有足够的耐热性，具有提高的拉伸延展性和抗冲击性的热导率。

公开(公告)号：US20230129157A1

公开(公告)日：2023-04-27

申请号：US17912727

申请日：2021-03-17

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Victor C. LI ,  Brian R. ELLIS ,  Duo ZHANG

IPC: C04B18/08 ,  C04B18/14 ,  C04B28/04 ,  C04B7/36 ,  C04B20/00 ,  C04B16/06

Abstract: Methods of preparing engineered cementitious composite precursors include carbonating a fly ash comprising >about 25% by weight of calcium oxide (CaO) and having a water content of >about 12% to about 40% by weight of calcium oxide (CaO) and having a water content of >about 12% to

公开(公告)号：US20220274876A1

公开(公告)日：2022-09-01

申请号：US17631408

申请日：2020-07-31

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Victor C. LI ,  Brian R. ELLIS ,  Duo ZHANG

IPC: C04B28/04 ,  B01D53/62 ,  B28B11/24 ,  C04B14/06 ,  C04B16/06 ,  C04B40/02

Abstract: Methods of preparing a cementitious structure for carbon dioxide (CO2) sequestration are provided. The cementitious structure may be a cast in a mold. First, a cementitious composite material comprising binder and water is conditioned, for example, in a mold by exposing the cementitious composite material to ≥about 50% to ≤about 80% relative humidity for ≥about 3 hours to ≤about 24 hours. The cementitious composite material is then dried to remove ≥about 10% by weight of initial water in the cementitious composite material. The cementitious structure formed is capable of a carbon dioxide uptake level of greater than or equal to about 6% by weight binder. The cementitious structure has a tensile strain capacity of ≥about 1% and a uniaxial tensile strength of ≥about 1 MPa. The method may also include carbonating the cementitious structure, following by an optional further hydration process.

公开(公告)号：US20150376489A1

公开(公告)日：2015-12-31

申请号：US14768049

申请日：2014-02-14

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Victor C. LI ,  Devki DESAI

IPC: C09K5/14 ,  C04B20/00 ,  C04B14/48 ,  C04B16/06 ,  C04B28/04 ,  C04B16/00

CPC classification number: C09K5/14 ,  C04B14/48 ,  C04B16/00 ,  C04B16/06 ,  C04B16/0625 ,  C04B16/0633 ,  C04B16/0641 ,  C04B20/0048 ,  C04B28/04 ,  C04B2111/00318 ,  C04B2201/32 ,  Y02A30/336 ,  Y02W30/92 ,  C04B14/062 ,  C04B18/08 ,  C04B20/10 ,  C04B24/36 ,  C04B2103/32 ,  C04B2103/0071 ,  C04B24/08

Abstract: A Thermally Adaptive Ductile Concrete (PCM-ECC) having a tensile ductility ceramic with 5 times the thermal resistance, 2 times the specific heat capacity, and 400 times the tensile strain capacity of regular concrete.

Abstract translation: 具有耐热性5倍，耐热容量2倍的普通混凝土的拉伸延性陶瓷的热适应性球墨体（PCM-ECC）和400倍的拉伸应变能力。